Rosemary focused on enhancing network error handling for agent name checks in the bytedance/deer-flow repository, delivering a feature that distinguishes CORS errors from generic failures to provide users with clearer, localized feedback. She implemented these improvements using TypeScript and frontend development techniques, integrating internationalization (i18n) to support multilingual user bases by adding zh-CN localization for error messages. Her work improved the user experience by clarifying error states during network issues, which helped reduce user confusion and support overhead. The depth of her contribution lies in addressing both technical robustness and usability, resulting in a more resilient and user-friendly interface.